Hypotheses
§Pseudocalanus moultoni and P. newmani have distinct source regions for the spring population
increase on Georges Bank. By
June, distributions are overlapping on the crest of the Bank.
§For P. moultoni, spring increase is caused by
reproduction of individuals retained on the Bank, and secondarily by transport of individuals
from the Gulf of Maine.
§P. moultoni is retained within the
cyclonic gyre throughout the year.
§For P. newmani, source regions are on the
Scotian Shelf; spring increase is caused by transport from these
upstream regions.
§P. newmani is transported along the
southern flank
of Georges
Bank, and becomes very abundant on the crest when the cyclonic gyre
closes.